182 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



lobe in the same position, but this lobe is armed with a small spine or well- 

 developed spinule upon its "postero-distal" angle; another such spinule 

 on a small lobular swelling or base is situated in the sinus between the 

 intermediate lobe and the intermediate spine, and still another of approxi- 

 mately the same size and conformation intervenes between the inter- 

 mediate and lateral spine of the margin of the telson. In the positions 

 corresponding to the last 2 spinules named, the telson of the west 

 American and Australian stylifera has a tiny unarmed and dorsally well- 

 nigh inconspicuous swelling or lobule; in these Pacific forms, also, the 

 intermediate lobes are posteriorly unarmed, without spines or spinules. 



Kemp's remarks on the segmentation of the mandibular palp of his 

 specimens are also of interest. His Chilean specimen has mandibular 

 palps composed of 3 segments, his Australian specimens, of but 2. No 

 doubt the right and left palp of each specimen was examined. Yet in our 

 one specimen from southern California the palp of the left side is com- 

 posed of 2 segments and the one on the right of 3. The reverse of this 

 count occurs in the male cotype of H. braziliensis, the female has both 

 palps 3-segmented, while the 3rd specimen of the species at hand, a male 

 from Ilha Rosa, Rio de Janeiro, has palps of only 2 segments each. This 

 variation in the number of segments in the mandibular palps of even the 

 one species may be rather the exception among stomatopods, but, never- 

 theless, in the genus Hemisquilla it renders the palp unavailable for spe- 

 cific characterization. 



Hemisquilla stylifera (H. Milne-Edwards) 



Gonodactylus styliferus H. Milne-Edwards, Hist. Nat. Crust., Vol. 2, 

 p. 330, pi. 27, figs. 9-14, 1837. Porter, Revista Chilena Hist. Nat., 

 Vol. 7, No. 5-6, p. 274, 1903. 



Pseudosquilla bigelowi Rathbun, Proc. U.S. Nat. Mus., Vol. 38, No. 

 1766, p. 608, 1910. 



Pseudosquilla stylifera Kemp, Mem. Indian Mus., Vol. 4, No. 1, p. 106, 

 one text fig., pi. 7, figs. 84-85, 1913, and synonymy. 



Pseudosquilla bigelowi Hilton, Jour. Ent. Zool., Pomona College, Vol. 7, 

 No. 2, p. 77, text figs., 1915; and Third Rept. Laguna Mar. 

 Lab., Pomona Coll., Art. 20, text and figure as in the Journal for 

 November, 1915. 



